Edge Flashing For Flat Roof With Functional Surface Material

Abstract

Various types of flashing for use at the edge of flat roofs, decking or green roofs are presented. In exemplary embodiments, flashing may be provided at the edge of a roof to retain or provide an edge treatment for an aesthetic and functional surface material, such as, for example, a cast paver, while at the same time allowing for water drainage.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application claims the benefit of U.S. Provisional Application No. 62 / 833,173 filed on Apr. 12, 2019, the disclosure or which is hereby incorporated herein by reference as if fully set forth.BACKGROUND—FIELD[0002]This application relates to flashing used at the edge of flat roofs to retain or edge an aesthetic and functional surface material such as a cast paver, while at the same time allowing for water drainage.BACKGROUND—PRIOR ART[0003]Most commonly when a relatively flat roof is going to be used as a functional balcony or terrace, there is material that is installed over the waterproofing membrane / roofing both for aesthetic and practical reasons. An example of this might be a wood deck with non-penetrating framing (sleepers). Another example would be a cast paver (such as a split brick paver). Another surface material would be an exterior tile (usually at least ¾″ thick). Another material would be stone pavers.[0004]Such s...

AI Technical Summary

Benefits of technology

This patent describes a type of flashing that is used to keep water away from roofs and to support pavers. The flashing has two parts: a trough for water and a perforated part that allows water to pass through. The flashing is installed under the surface material, which helps to make the installation stronger and longer-lasting. It is flexible and aesthetically pleasing, harmonizing with the architecture. The flashing is easy to manufacture and install, and there is space to work inside the trough during installation. Overall, the flashing provides better protection for the roof and easier and more attractive installation.

Problems solved by technology

These devices, however, do not allow for water drainage if water were to get under the installed surface material.

However, when the pitch of the roof directs water towards the outer edges, ponding will occur if the edging system does not allow for the water to pass.

If a surface material abuts into such a vertical edge, the holes may be partially or completely blocked so that the water may be slow to release and ponding could occur.

Often a roof surface is not perfectly square.

Such a gap could collect debris over time and become less aesthetically pleasing.

Also, the edging referenced may become noticeably pitched if pressed out by the abutting surface material.

One challenge of the U.S. Pat. No. 8,739,490 flashing is that there are many different thicknesses of surface material.

Also, if the desired surface material to be installed is not of consistent thickness, gaps under the irregular leg of flashing could collect debris.

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